Triangle read by rows: T(n,k) is the number of partitions of an n-set having k blocks of size > 1 (0<=k<=floor(n/2)).
A124324
Triangle read by rows: T(n,k) is the number of partitions of an n-set having k blocks of size > 1 (0<=k<=floor(n/2)).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =4a(6) =1a(7) =11a(8) =3a(9) =1a(10) =26a(11) =25a(12) =1a(13) =57a(14) =130a(15) =15a(16) =1a(17) =120a(18) =546a(19) =210a(20) =1a(21) =247a(22) =2037a(23) =1750a(24) =105a(25) =1a(26) =502a(27) =7071a(28) =11368a(29) =2205
External references
- oeis: A124324